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Just like today's PCs the Z3 had a CPU where arithmetic was carried out, memory in which to store data, was programmable via its tape reader, and had a unit to display the output of its calculations. The other thing that that it had in common with today's computers was that it used binary to carry out its calculations - which greatly simplified the structure of its components. The memory was made up of 2,600 telephone relays - basically electromechanical switches that could represent binary 0s and 1s - that allowed it to handle 64 22-bit numbers.

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The Ferranti's memory was built from cathode ray tubes (CRT) - that at the time were more commonly used by TV and radar displays. The CRT memory - known as Kilburn-Williams tube and seen here - writes information in a similar fashion to the way an old CRT TV displays a picture. It fired an electron beam at a phosphor screen to write a binary 0 or 1 - a bit - to memory. The beam alters the distribution of electrical charge on the screen and this change is detected by a metal screen or mesh that sitting alongside the tube.

Because the charge dissipates rapidly the beam had to be constantly fired to keep the bit in memory.

Of course, the memory capacity of the Ferranti was, tiny by modern standards, holding a fraction of the data of a single MP3 album track today. The machine used eight CRTs for its primary memory - each capable of storing 32 40-bit words.

Back up 2 computers on 1 USB hard drive?I have a home network. Win 7 Home Premium.
I have a desktop and laptop that I back up on separate USB hard drives. I need to use one of them for my Dish Network receiver and can't afford to buy another one.
Can I set up my computers to both use the network to back up to the same 1000 TB USB hard...

Backup and Restore

Default Gateway Is Not Available (i know it's been brought up before)Hi all,
I know this has come up a lot here and elsewhere but I haven't found a solution that works for me. Also, my problem seems a little different - while most people I've seen talk about this issue mention getting disconnected from the internet a few times a day, or when they reboot, to me...

Network & Sharing

My new video card only brought on a new problem!Well, I have managed to come up with another video card problem...
I have a Dell Inspirion 530 with Windows 7 Ultimate installed. Recently the original graphics card failed (128 MB GeForce 8300GS).
I talked about that issue in an earlier...

Graphic Cards

Today's BSOD is brought to you by.....After being told it was my DirectX which was causing my BSOD, I formatted and slowly reinstalled everything. And today I get this wonderful message.
Stats on system:
AMD Phenom 2 965
4 x 4GB Corsair DDR3
Gigabyte GA-890GPA-UD3H MB
ASUS EAH6850 graphics card.
Any assistance would be...

BSOD Help and Support

Wireless dies, then comes back to life...Hi guys,
Firstly, Windows7 Rocks.
But, when I startup, I have a good wireless connection, but aftre about 20 seconds, the network connection dies. My wireless indicator (Tray Icon) shows a good connection, but pinging my router (192.168.1.1) doesn't reply with anything. Not internet, not...